The all-or-none law refers to the observation that an action ...

[Beheh]

The all-or-none law refers to the observation that an action potential
 
  A) will diminish to near zero when transmitted down a long axon.
  B) fires at the same rate regardless of the inputs to the neuron.
  C) is conducted more rapidly down the axon as it reaches the axon terminal.
  D) is produced whenever the membrane potential reaches threshold.
  E) travels only in one direction.

Question 2

Which of the following is true of an action potential?
 
  A) The sodium channels are opened at a lower voltage than are potassium channels.
  B) An action potential requires 5 msec for completion.
  C) During an action potential, the interior becomes even more negative.
  D) The potassium channels are opened at a lower voltage than are sodium channels.
  E) The overshoot is due to a prolonged change in sodium conductance.

[skipfourms123]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: A
Rationale: During an action potential, the sodium channels are opened at a lower voltage than are potassium channels.

[Beheh]

Thank you!

[skipfourms123]

Happy to help